G99 Taiwan Ring Expressway

The Taiwan Ring Expressway (Chinese: 台湾环线高速公路) was a proposed, hypothetical expressway encircling the island of Taiwan as part of the National Trunk Highway System of the People's Republic of China. It never came into fruition, though, due to the political status of Taiwan.

Source: Wikipedia — G99 Taiwan Ring Expressway (CC BY-SA 4.0)